Just saw the diagram Mark. I see you've made enough mods to rewire the polarity on all the terminals. I'm going to give this a shot - I think my soldering skill should be good enough with these large targets.

Any recommendations on how to best cut the traces on the board? Scrape them with a nail? Cut them with utility/x-acto knife?

Actually, the part I'm most worried about is soldering wire to points on the board where there aren't any existing pads (marked in green). Should I just scrape up a small area for the wire?